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Finding the Fourth Proportional to 18,438.56, 25,445.12 and 10,055.04

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Solution

The fourth proportional to 18,438.56, 25,445.12 and 10,055.04 is: 13,875.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.56 : 25,445.12 = 10,055.04 : x
  2. Step 2: Convert to fraction form
    18,438.56/25,445.12 = 10,055.04/x
  3. Step 3: Cross multiply
    18,438.56x = 25,445.12 × 10,055.04
  4. Step 4: Simplify right side
    18,438.56x = 255,851,699.40
  5. Step 5: Solve for x
    x = 255,851,699.40/18,438.56
  6. Step 6: Final answer
    x = 13,875.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.